Hi mannen

I plugged your itinerary into the usually excellent OWE verification tool at http://jph.bytestacker.com/award.htm and it validated the itinerary.

Partial results below: (it will also calculate status credits/tier points etc. for QF, IB, BA or AA)

1: ARN-MAD: 1st of 4 (Europe)
2: MAD-SCL: intercontinental
3: SCL-GRU: 1st of 4 (South America)
4: GIG-SCL: 2nd of 4 (South America)
5: SCL-IPC: 3rd of 4 (South America)
6: IPC-SCL: 4th of 4 (South America)
7: SCL-AKL: intercontinental
8: CHC-SYD: 1st of 4 (Southwest Pacific)
9: SYD-CNS: 2nd of 4 (Southwest Pacific)
10: CNS-NRT: intercontinental
11: KIX-HKG: 1st of 4 (Asia)
12: HKG-SIN: 2nd of 4 (Asia)
13: SIN-BKK: 3rd of 4 (Asia)
14: BKK-HEL: intercontinental
15: HEL-ARN: 2nd of 4 (Europe)

Congratulations!! Valid itinerary!!! - (37794 miles)

So it looks like IPC is a valid destination (I haven't studied OWE rules lately but cannot think of a reason why it woudn't be),

Cheers